P0717 CHEVROLET - Input/Turbine Speed Sensor Circuit No Signal
Faulty Transmission Speed Sensor
Transmission Speed Sensor harness is open or shorted
Transmission Speed Sensor circuit poor electrical connection
When is the code detected?
Diagnostic Trouble Code (DTC) P0717 is detected when TCM or ECM receives no signal from the sensor.
Engine Light ON (or Service Engine Soon Warning Light)
Possible shifting problems
P0717 Chevrolet Description
The Input Speed Sensor (ISS) is a hall-effect type sensor. The ISS mounts to the control valve upper body assembly and connects to the control solenoid (w/body and TCM) valve assembly through a wire harness and connector. The sensor faces the 1-2-3-4 and 3-5-R clutch housing machined teeth surface. The sensor receives 8.3-9.3 volts on the Input/Output Speed Sensor (ISS/OSS) supply voltage circuit from the Transmission Control Module (TCM). As the 1-2-3-4 and 3-5-R clutch housing rotates, the sensor produces a signal frequency based on the machined surface of the 1-2-3-4 and 3-5-R clutch housing. This signal is transmitted through the ISS signal circuit to the control solenoid (w/body and TCM) valve assembly. The control solenoid (w/body and TCM) valve assembly uses the ISS signal to determine line pressure, transmission shift patterns, Torque Converter Clutch (TCC) slip speed and gear ratio.